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The effect of dietary protein and energy density on nitrigen metabolism in growing pigs
Authors
Yang-Guang Fan
范揚廣
Publication date
6 June 2014
Publisher
畜牧研究所
Abstract
為瞭解不同可消化能(DE)與理想蛋白質(Idela protein )濃度對生長豬氮代謝 的影響而進行本試驗。 採用日齡(平均104日)與體重(平均33.5公斤)相近之三品種雜交肉豬36 頭,依逢機完全區集設計,每一重複為一區栠,配入9種使用不同飼料的試驗處理。 試驗飼料為3×3複因子之處理安排,即按3種可消化能濃度(16.0,14.5 及13.0MJ/kg飼料)以及各種可消化能濃度分別再依3種離胺酸對可消化能 之比(0.84,0.76及0.68g離胺酸/MJDE)配成。調整餵料量以使 各處理組攝取等量之可消化能,並依14.5MJ DE/kg處理組為準估計餵料 量(g/日)=241.894體重(kg)^0.4873。 試驗結果顯示:飼料可消化能濃度(XMJ/kg)對熱能消化率(ED),氮消化 率(ND),氮蓄積量(NR)及飼料濺出量(SF)有顯著的影響。迴歸方程式依 次為ED(#)=-268.29+47.13X-1.55X;ND(%)=- 227.42+41.42X-1.36X;NR(g氮/體重(kg)^0.75 / 日)=-9.26+1.43x-0.05X;SF(kg飼料/7日)=1.3 84-0.077X。欲得最佳之熱能消化率,氮消化率及氮蓄積量,飼料之可消化 能含量分別為15.2,15.2及14.9MJ/kg。飼料熱能濃度與離胺酸/ 可消化能比之間的交互作用對熱能消化率,氮消化率,氮蓄積量及飼料濺出量影響不 顯著(P>0.25)。提高飼料離胺酸含量(0.68至0.84g/MJ DE )雖可增加氮蓄積量但不顯著(0.10>P>0.05)
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Last time updated on 16/06/2016